工作面支架推拉头连接的标准是（）A、正确使用标准连接销 B、每个销要配用标准垫圈 C、正

Thirty years ago, Lake Ponkapog in Hartwell, New Jersey, was full of life. Many birds and animals lived beside the water, which was full of fish. Now there are few birds, animals, and fish. The lake water is polluted. It is in a colour of dirty brown, and it is filled with strange plants.

How did this happen? First, we must think about how water gets into Lake Ponkapog. When it rains, water comes into the lake from all around. In the past, there were forests all round Lake Ponkapog, so the rainwater was clean.

Now there are many homes around the lake. People often use the chemicals (化学制品)in their gardens. They use other chemicals inside their houses for cleaning and killing insects. There are also many businesses. Businesses use chemicals in their machines of shops. Other chemicals fall onto the ground from cars or trucks. When it rains, the rainwater picks up all the chemicals from home and businesses and then carries them into the lake . They pollute the water and kill the animals.

Boats on the lake are also a problem. Lake Ponkapog is a popular place for motorboats（汽船）. But oil and gas from boats often get into the lake. So more bad chemicals go into the water this way.

People in Hartwell are worried . They love their lake and want to save it. Will it be possible? A clean lake must have clean rainwater going into it. Clean rainwater is possible only if people are more careful about chemicals at home and at other chemicals on the ground. And they mustn’t use motorboats any more on the lake. All these may change people’s lives. Only then can Lake Ponkapog be a beautiful, clean lake again.

小题1:In the past, the water in Lake Ponkapog was made clean by ________.

A．forests

B．rain

C．birds

D．fish小题2:Chemicals from homes and businesses _________.

A．are always clean

B．can help the animals

C．are good for the lake

D．get into the rainwater小题3:Cleaner rainwater will mean _________ .

A．more boats on the lake

B．more dirty things in the lake

C．a cleaner lake

D．a dirty lake小题4:To save Lake Ponkapog, people need to ________.

A．be more careful about chemicals

B．use the water

C．grow fewer plants in the gardens

D．use more motorboats on the lake小题5:The passage is about ________.

A．boats on the Lake Pankapog

B．why the water is dirty in Lake Ponkapog

C．clean rainwater

D．dirty lakes

THDS-A红外轴温探测系统探头按工作方式可划分为（）探头和直流探头。

A、脉冲

B、调制

C、感应

D、接触

地层的接触关系可分为（）、（）。

2009年济南市工业、建筑业发展势头良好。工业生产回升步伐加快。2009年，全部工业增加值1211.4亿元，增长10.3%。其中，规模以上工业增加值1154.0亿元，增长11.2%。工业效益向好趋势增强。2009年，规模以上工业主营业务收入3926.4亿元，增长5.9%；实现利税457.0亿元，增长28.7%；实现利润231.7亿元，增长31.1%。企业亏损面12.08%，提高0.42个百分点；亏损企业亏损额7.6亿元，下降74.3%。产品结构趋向优化。在全部工业产品中，产量增长的产品占57.3%，提高1.4个百分点。高新技术产品增长较快，传统产品增势趋缓。支柱行业平稳发展。2009年，全市六大产业集群实现工业增加值877.8亿元，增长10.3%。其中，电子信息增长25.9%，食品药品增长20.8%，机械装备制造增长20.3%，石油化工增长14.4%，交通装备增长9.0%，冶金钢铁下降15.8%。全年主营业务收入过亿元企业678家，其中过10亿元企业38家，分别增加165家和减少4家。园区承载能力增强。2009年，济南出口加工区及8家省级经济开发区年末规模以上工业企业521家，占全市规模以上工业企业的比重为24.2%，提高0.1个百分点；工业增加值223.2亿元，增长13.8%，占全市规模以上工业企业增加值的比重为19.3%；实现利税总额95.1亿元，增长31.1%，占全市规模以上工业企业的20.8%；固定资产投资181.2亿元，增长28.5%，占全市固定资产投资的比重为10.9%。
建筑业较快发展。2009年，全市建筑业增加值242.2亿元，增长24.4%。产业集中度不断提高，注册地在济南的特级企业7家，产值过10亿元企业23家，过50亿元企业2家。有形建筑市场进一步规范，进场交易工程项目1093项。具有资质等级建筑业企业738家，资质建筑业企业房屋施工面积4119.8万平方米，竣工房屋价值128.0亿元。实现铁路、道路、隧道和桥梁工程建筑产值236.6亿元。

2009年，平均每家具有资质等级的建筑业企业施工( )万平方米。

A．5.47

B．5.58

C．5.64

D．5.93

取水构筑物、一级泵站和水厂等的流量按最高日最高时用水量来计算